Require at least OpenSSL 3.2.0

EVP_MD_CTX_dup(0 is not available until 3.2.0, so raise the minimum
requirement for rustls

Signed-off-by: Simo Sorce <simo@redhat.com>

Author: simo5

rustls/ossl/Cargo.toml

@@ -14,7 +14,7 @@ dynamic = ["ossl/dynamic"]
 
 [dependencies]
 rustls = { version = "0.23.40", default-features = false }
-ossl.workspace = true
+ossl = { workspace = true, features = ["ossl320"] }
 
 [dev-dependencies]
 rustls = { version = "0.23.40", default-features = false, features = ["std"] }